Looking to buy a watch rather quickly as my Rolex must go back to teh shop. I've been looking at some recent Hamilton chronographs but am cionfused. What appears to be the typical Hamilton chron has a tachymeter scale on the bezel, however, there are Hamiltons being sold that have a telemeter scale on the bezel. These watches are hard to come by and I'm trying to get the tachymeter version...tachymeter does not equal telemeter. I don't know if this is a manufacturing variance, a product center variance, or are they frauds? Anyone know what's going on with this?